dbus-monitor − debug probe to print message bus messages
dbus-monitor [−−system | −−session | −−address ADDRESS] [−−profile | −−monitor] [watch expressions]
The dbus-monitor command is used to monitor messages going through a D-Bus message bus. See
http://www.freedesktop.org/software/dbus/ for more information about the big picture.
There are two well-known message buses: the systemwide message bus (installed on many systems as the
"messagebus" service) and the per-user-login-session message bus (started each time a user logs in). The
−−system and −−session options direct dbus-monitor to monitor the system or session buses respectively.
If neither is specified, dbus-monitor monitors the session bus.
dbus-monitor has two different output modes, the ’classic’-style monitoring mode and profiling mode. The
profiling format is a compact format with a single line per message and microsecond-resolution timing
information. The −−profile and −−monitor options select the profiling and monitoring output format respec-
tively. If neither is specified, dbus-monitor uses the monitoring output format.
In order to get dbus-monitor to see the messages you are interested in, you should specify a set of watch
expressions as you would expect to be passed to the dbus_bus_add_match function.
The message bus configuration may keep dbus-monitor from seeing all messages, especially if you run the
monitor as a non-root user.
Monitor the system message bus.
Monitor the session message bus. (This is the default.)
Monitor an arbitrary message bus given at ADDRESS.
Use the profiling output format.
Use the monitoring output format. (This is the default.)
Here is an example of using dbus-monitor to watch for the gnome typing monitor to say things
dbus-monitor was written by Philip Blundell. The profiling output